Desi works very well with Leveticus' crew, due to the shear number of abominations you can put into play, coupled with the Lost Focus ability, he a has enormous potential to reform,especially if you take the time to summon abominations with Levi, Rusty Alice, and other abominations. Also, due to him "forming" he literally cost 0 soul stones if you go that route. Pretty much use him as wrecking ball, back him up with some summoned aboms, when/if he dies, do it all over again.